Hoisting-engine



, UNITED STATES PATE T OFFICE.

THOMAS DILL, OF BAY CITY, ASSIGNOR 'ro JAMES oLnMENTs, or ANN ARBOR, MionIeAN.

HOISTIN'G-IENGINE.

SPECIFICATION forming part of Letters Patent No. 244,716, dated July 19,1881.

' Application filed January 13, 1881. (NomodeL) To all whom it may concern Be it known that I, THoMAs DILL, of Bay City, in the county of Bay and State of Michigan, have invented anew and useful Improvement in Hoisting-Engines, of which the following is a specification. p

In the drawings, Figure 1 is a side View of my invention as applied to an excavating-machine with the cylinder and piston in section. Fig. 2 is a top sectional view on line w as in Fig. 1.

My invention consists of .a hoisting'engine in which the piston rocks instead of rotating, and in which the hoisting-drum is actuated by a shaft rigidly. secured to the pivotal point of the piston, with or'without the intervention of gearing.

A is a circular steam-cylinder, secured to a foundation by suitable braces, as shown at F.

B is asmall cylinder'concentric with A, and

.turning steam-tight in A.

O is piston cast on or fastened on cylinder B, and moving with cylinder B.

D is a partition or cylinder-head cast on the inner side of cylinder A, or otherwise securely fastened therein, making a steam-tight wall in cylinder A. The inner end of partition or wall D is properly packed so as to makea steamtight joint with cylinder B, and the sides and outer end of piston G are properly packed, so that the piston will move steam-tight in cylinder A. As the partition D is immovable and the piston O is rigidly fastened to cylinder B, it will be at once seen that this is not a rotary engine, and that the piston can never make a complete revolution. I prefer to set partitionD at the angle shown in the drawings, so that when piston O is turned as far as possible in the direction of the arrow its face will be parallel with the face of partition D to partially guard against breakage of piston O by its coming in contact with partition D.

Ois an air-vent in cylinderA, through which the air can escape when the piston is forced in the direction indicated by the arrow.

I isavalve for admitting steam to or exhausting from cylinder A, and is worked by a lever, G, and connecting-rod H.

L is a valve similar to I, for admitting steam to or exhausting from cylinder A. The partition D is between the ports controlled bythe valves I and L, respectively,so that said valves will admit steam when opened on opposite sides of piston O. A

T is a bell-crank lever connected with valve L, and so placed that whenever the piston 0 passes any fixed point a tappet, S, carried on shaft IE, will strike the lower arm of bell-crank lever T and open valve L and admit steaminto cylinder A, so as to check the motion of and cushion piston O. A spring connected with the bell-crank lever T holds valve L closed, ex-

cept when the bell-crank lever T is moved by tappet S or by the engineer. Valve L may also be operated by a lever and connectingrod when its use is desired to return piston O to its starting-point but in ordinary use it is not necessary to use valve L, except as a safeguard against breaking piston O, as the weight of the device used for holding the articles to be raised will ordinarily return piston 0 when not opposed by steam-pressure. Vent 0 may also have a valve connected with a bell-crank lever, so that when piston 0 passes the position shown in dotted lines, or any determined position, tappet S will closethe valve to vent O, and thus cause the air in cylinder A to act as a cushion for the piston.

Eis a shaft, attached firmly to piston U at its pivotal point, and rocked by piston G.

R is a wheel or drum for winding up the hauling-chain, and is actuated by shaft E, with or without theintervention of gearing, as the work to be done may require. The wheel B may bemade with two grooves in its face, so that two chains may be used, if desired. Tap: pet S may be rigidly fastened to wheel B when this is fastened on shaft E.

The operation of my engine is as follows: Vent 0 being open and valves I and L being closed, valve 1 is opened by the engineer and steam is admitted to cylinder A. The steam coming in between partition D and the piston G will force the piston in the direction shown by the arrow, turning shaft E and winding up the hauling-chain on drum or wheel R. YVhen the load to be lifted has been raised far enough valve I is closed by the engineer, and the steam in cylinderA keeps the load suspended while the load is being swung to its place of destination or dumped. As soon asthe load is in place, valve I is turned by the engineer so as to exhaust steam from eylinderAthrough the exhaust-pipe M, which is connected with the valve 1 opposite the steam-supply pipe K, and by this means piston O returns to its starting-point, either by the weight of the device used to hold the load, or by steam pressure admitted through valve L.

Heretofore rotary steam-engines have been provided with two abutments and a shaft provided with oscillating pistons, live steam being admitted alternately 011 opposite sides of one of the abutments to partially rotate said pistons in reverse directions. Further, a rotary steam-engine has been provided with a shaft having radial pistons continuously revolving in one direction, a cam on one end of the shaft serving to act on a steam-supply valve to admit steam to the pistons, said valves automatically closing as soon as the cam passes them, thereby permitting the steam to act by expansion in the steam-cylindcr. Such features, however, do not constitute my invention, and

' are not claimed by me.

VVhatI claim as my invention, and desire to secure by Letters Patent, is-

1. In a hoisting-engine, the combination, with a steam-cylinder having an immovable partition, and a horizontal shaft provided within the cylinder with a piston, and having a winding-drum arranged on the exterior of the cylinder, of a valve connected with the steamcylinder, and both with a steam-supplypipe and a steam-exhaust, and mechanism connected with said valve and controllable by an attendant, for supplying and exhausting steam to and from the cylinder, substantially as and for thepurpose described.

2. In a hoisting-engine, the combination, with the steamcylinder A, immovable partition D, center B, piston O, and horizontal shaft E, provided with an exterior winding-drum, of a valve, I, connected with the steam-cylinder, and with a steam-supply pipe, K, and a steam-exhaust pipe, M, and apivoted lever, and connecting-rod between said lever and the valve, substantially as shown, whereby the valve is placed under control of the attendant, for supplying and exhausting steam to and from the cylinder, as set forth.

3. In a hoisting-engine, the combination, with the cylinder A, immovable partition 1),

piston O, and horizontal shaft E, provided with the exterior winding-drum, of two disconnected valves, I and L, both communicating with a steam-supply pipe, K, and the valve I, communicating also with an exhaust-pipe, M, and mechanism connected with the valve I and controllable by the attendant, for supplying and exhausting steam to and from the steam-cylinder, all substantially as described.

THOMAS DILL. Witnesses:

H. M. GELLETT, E. A. OooLEY. 

